Description: Grated Tryonia, a member of the Hydrobiid family, are very minute aquatic prosobranch snails. These snails are typically less than 5 mm (0.2 in.) in length, cone-shaped, and with prominent ridges running the length of the shell.
Diet: Unknown.
Habitat: Freshwater spring systems, typically occur on or in algae and detritus substrates and slow current.
Range: Known to occur in the Cardy Lamb and Muddy Spring systems; likely to occur in the Warm Springs area, all in Clark County, Nevada. May also occur in the Pahranagat and White River valleys to the north.
Comments: The MSHCP lists other species of Tryonia, but little is known about them.

List of Tryonia Species

Dry Lake Bed species, Tryonia sp.
Undescribed tryonia, Tryonia sp.